Improvement in steam-engines



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N. PETERS. PHOTOALITNQGHAPHER, WASHINGTON, D C.

UNITED vSTATE'i's .AJTEH'T @Errea HENRY L. BUTLER AND THOMAS A. CHRISTIE, `oF PTTS'B'URG, PA.;

SAID CHRISTIE ASSIGNS HIS RIGHT To SAID BUTLER.

IMPROVEMENT IN STEAM-ENGINES.

@To all whom 'it may concern;

Beit known that we, HENRY L. BUTLER and THOMAS A. CHRISTIE, ofthe city of Pittsburg, in 4the county of Allegheny and AState of Pennsylvania, have invented a new and useful Improvement in Steam-Engines 5 and We do hereby declare the following to be a full, clear, and exact description thereof, reference being had to the accompanying drawing, forming part of this specification, in Whichy Figure l is an exterior vertical representa- ,tion of our engine. Fig 2V is a vertical sec- `tion lthrough m .c Aof Fig. l, showing the piston at the completion of its upstroke, similar section, A'showing the piston at the completion of its downstroke.' Fig. 4 is a secv fanimproved lengine when not used as Vbutfor communicating' Apower to other Yori;I gurcs tlike letters denote e-.may be used either as 'lrswater or oil, &c., or as 'nei-to comm unicate .power th, Ix1`-a.f z1l,1 ,rag-:ryuL It operated by the diec "etlonhof live steam on one stroke; but e-iseturn'stroke is effected by the force of Water` or other comparatively inelastic fluid undersufieient pressure, which passes in and o he piston-cylinder through a cock, by he-.opcning of which the fluid is andfuniform motion of the enementgin engines, we will proceed Lemougstruction and operation of aptedftofpump Water, oil, or

` mpailying drawing, A is the piser;inutghich works the piston B, to y attac-hedfthe valve-stem a. The pis- 'onf-B -hasa hol1ow cylindrical extension, b, which, when used for pumping purposes, works over a stationary packing, d, at the upper end of the hollow cylindrical packingrod c, the packing-head d at the upper extremity of the rod c fitting accurately in the cavity f of the extension b, and being seated in the .the piston-extension b works in the -Inder C. This construction furnishes an an- Eig. 3 is a.

`@pass more or less rapidly, and

Specification forming part of Letters vPatent No. l06,777,1dated August 30, 1870.

top of the cylindrical support g, around which pump-cylnular chamber, h, in the piston-cylinder, and another'annular chamber, i, in the pump-cylinder C, into the former of which, h, water is forced, to raise 'the piston B by pressure against the under face as of the lpiston B, and

the latter, i, is the working-barrel of the pump,

of which theannular extremity w of the piston-extension b forms the Working-piston.

The space yaround the packing-head d is filled with metallic or otherpackin'g, which is forced outward against the cylindrical piston-exten-v sion b by the inclined face of the upper part oi the packing-head d, land of the upper end of the cylindrical supportg, when the packing-head d is drawn down by screwing up the nut n at the lower end of the packing-rod c, which extends through the head-piece D ot" the pump-cylinder (l for that purpose.

E is the opening, to which is attached lthe supply-pipe leading to the wateror other duid to be pumped, and 7c is the valve, opening upward, which admits the supply-water into the passage l opening into the bottom ofthe pumpcylinder C.

F is the discharge-passage for the water, which communicates with the steam -boiler below the water-line'in case the apparatus is employed to feed Water into the boiler; but if the apparatus is employed to supply a reservoir, or for other purpose Where the discharge-pipe F can be connected with a column of water, so as to employ hydrostatic pressure, that will answer instead of the boilerpressure.

A valve, m, opening upward from the supply-passage Z into the discharge-passage F, rises on the descent of the piston-extension b for the passage ofthe water forced out of the pump chamber i into the passage F, and thence into the steam-boiler or other receptacle, the reciprocating Inotion of the pistonextension b in the pump-chamber z' acting to draw Water through the valve k and force it through the valve m and passage F into the steam-boiler.

The discharge-passage F connects with the chamber h of the piston-cylinder by a smaller 

